#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

int main()
{

	unsigned char a = 0;
	unsigned char b = 255;
	a = a - 1;
	b = b + 1;
	printf("a=%u\n",a);
	printf("b=%u\n",b);

		 

	return 0;
}













int main() 
{
	unsigned char i = 7;
	int j = 0;
	for (; i > 0; i -= 3) {
		++j;
	}
	printf("%d\n", j);
	return 0;
}